Piston valve assembly oil shield



FIG. 1 is a front elevational view of a piston valve assembly oil shield showing our new design and shown positioned at the bottom of a piston valve assembly of a musical instrument;

FIG. 2 is a top and front perspective view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being identical;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof;

The broken line showing of the piston valve assembly of a musical instrument in FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a piston valve assembly oil shield, as shown and described. 